watchOS 5.0 (build 16R5283q) is an official Apple over-the-air update for the Apple Watch Series 2 (42mm), released on 2018-06-05T09:52:39Z. The update package is 581.75 MB. This is a delta (partial) update that requires 4.2.3 already installed. This update is no longer signed by Apple, meaning it can no longer be applied on-device through Settings.

Payload file: 539bdb9cbd2cdf2829b466889de3808746035636.zip.